bn:00148563n
Noun Concept
Categories: Balloon-borne experiments, Amateur radio
EN
high-altitude balloon  Balloons for X-ray astronomy  Geostationary balloon satellite  high-altitude balloons  high altitude balloon
EN
High-altitude balloons or stratostats are usually uncrewed balloons typically filled with helium or hydrogen and released into the stratosphere, generally attaining between 18 and 37 km above sea level. Wikipedia
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EN
High-altitude balloons or stratostats are usually uncrewed balloons typically filled with helium or hydrogen and released into the stratosphere, generally attaining between 18 and 37 km above sea level. Wikipedia
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